SPI Register Read

R2026b

Read data from SPI peripheral device register

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SPI Register Read block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Raspberry Pi Blockset / Communication

Description

The SPI Register Read block initiates an SPI read operation from an SPI peripheral register. You can specify the data type and data length to get data from the peripheral registers. To open the pin map of the Raspberry Pi board, click the View pin map button.

For more information on SPI communication, refer to Support SPI Communication and Raspberry Pi SPI Interface

Note

To generate C/C++ code for this block, you must have an Embedded Coder^® license.

Ports

Output

Port_1 — Output port to read data

[Nx1] array

This port is the output port to read data from an SPI peripheral register.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32

Parameters

Board — Specific board used for SPI communication

Pi 2 Model B (default) | Model B Rev1 | Model B Rev2 | Model B+ | Pi 3 Model B | Pi 3 Model B+ | Pi Zero W | Pi 4 Model B | Pi Zero 2 W | Compute Module 4 | Pi 5 Model

Select the specific board that you are using. Changing the board updates the pin choices that you get.

Chip select pin — Pin connected to the SPI peripheral device

SPI0_CE0 (default) | SPI0_CE1 | SPI1_CE0 | SPI1_CE1 | SPI1_CE2

Select the pin number on the Raspberry Pi board to which the SPI peripheral device is connected.

To enable the secondary SPI bus on your Raspberry Pi^® hardware, follow the steps as mentioned in Enable Secondary SPI Bus of Raspberry Pi Hardware.

Mode (Clock polarity and phase) — Mode of SPI communication

0 (default) | 1 | 2 | 3

Select the mode of SPI communication.

Register address — Register address to read the data

0 (default) | uint8 array

Enter the SPI peripheral register address to read the data.

Output data type — Data type for output

int8 (default) | uint8 | int16 | uint16 | int32 | uint32 | single | double

Select the data type for SPI communication.

Output data length — Data length for SPI communication

1 (default) | scalar

Enter the output data length of the selected data type to read from the SPI peripheral register.

Sample time — Interval at which block reads data from SPI peripheral device

0.1 (default) | -1 | any nonnegative value

Specify how often this block reads the data from the SPI peripheral device, in seconds. When you set this parameter to -1, Simulink^® determines the best sample time for the block based on the block context within the model.

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"raspberrypiCommlib/SPI Register Read"

Example: add_block("raspberrypiCommlib/SPI Register Read","myModel/myBlock",MakeNameUnique="on")

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using Simulink® Coder™.

To generate C/C++ code for this block, you must have an Embedded Coder license. For more information on selecting the right product stack according to your development goals, see Product Stack for Raspberry Pi Blockset.

Version History

Introduced in R2017a